src/java/org/apache/hcatalog/mapreduce/ProgressReporter.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hcatalog.mapreduce;

import org.apache.hadoop.mapred.Counters;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapreduce.StatusReporter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.TaskInputOutputContext;

class ProgressReporter extends StatusReporter implements Reporter {

    private TaskInputOutputContext context = null;
    private TaskAttemptContext taskAttemptContext = null;

    public ProgressReporter(TaskAttemptContext context) {
        if (context instanceof TaskInputOutputContext) {
            this.context = (TaskInputOutputContext) context;
        } else {
            taskAttemptContext = context;
        }
    }

    @Override
    public void setStatus(String status) {
        if (context != null) {
            context.setStatus(status);
        }
    }

    @Override
    public Counters.Counter getCounter(Enum<?> name) {
        return (context != null) ? (Counters.Counter) context.getCounter(name) : null;
    }

    @Override
    public Counters.Counter getCounter(String group, String name) {
        return (context != null) ? (Counters.Counter) context.getCounter(group, name) : null;
    }

    @Override
    public void incrCounter(Enum<?> key, long amount) {
        if (context != null) {
            context.getCounter(key).increment(amount);
        }
    }

    @Override
    public void incrCounter(String group, String counter, long amount) {
        if (context != null) {
            context.getCounter(group, counter).increment(amount);
        }
    }

    @Override
    public InputSplit getInputSplit() throws UnsupportedOperationException {
        return null;
    }

    public float getProgress() {
        /* Required to build against 0.23 Reporter and StatusReporter. */
        /* TODO: determine the progress. */
        return 0.0f;
    }

    @Override
    public void progress() {
        if (context != null) {
            context.progress();
        } else {
            taskAttemptContext.progress();
        }
    }
}